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Problem of inserting values into array within a for loop
Hi Kornelia, This one has a straight forward answer. perimeterLength = regionprops(blob, 'Perimeter'); will always re...

11年弱前 | 0

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How can I share image data between callbacks?
Hi Saurabh, This one has a simple solution. Note the call in your first function: handles.pushbutton1 = imread(uigetfile...

11年弱前 | 0

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Performing stats on subsections of a matrix
Hi Swisslog, Try this: a = [1 1 1 2 2 4; 3 5 4 7 2 5]; % Pack your matrix contents into a cell array [unqA,~,grps]...

11年弱前 | 0

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Why is my surf animation so slow?
Hi Phil, There are a few things you can do to speed this up. Firstly, the *pause* command will force your loop to sit idle...

11年弱前 | 0

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How do I change Grid Size in R2013a?
Hi Edgar, You can set the *XTick* locations of an axis (or the current one via *gca*) directly: tickValues = min(x):0.1:...

11年弱前 | 1

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Contributors metainfo: reputation and more
*Recent news:* ... and *BAM!* Walter hits *25,000*! Congratulations are in order again. It's impressive to see, but depressin...

11年弱前 | 4

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how to project images on the side walls of a 3D surf plot
Hi Konstantinos, Does this code get you on your way? R = 0:0.1:1; z = cos(-R); % that'd be your current y-f...

11年弱前 | 1

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What's on your personal MATLAB to-do list?
A triangulation3d class which would basically inherit the standard triangulation class, but add useful features specifically for...

11年弱前 | 2

質問

What's on your personal MATLAB to-do list?
What MATLAB tools or functions have you been thinking about making but haven't quite gotten around to it? It can be something...

11年弱前 | 6 件の回答 | 2

6

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Reading lines from a text file and storing them into an array.
Hi Surush, The trick is to put each line in an element of a cell array. Here's some commented code that does what you're t...

11年弱前 | 11

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Error using surf() with colorbar and title
Hi Christian, try this: opengl('software') figure,surf(magic(99)),colorbar,title('Va') Does that sort it out as well?...

約11年前 | 0

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How to execute a function after the value of a property changed? Problems with callback function
If all of the observation of *PMV* is done by the *RB* class itself, so there's actually a better/cleaner way to do what you're ...

約11年前 | 0

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find intersection between two data sets
Hi Carlos, try this code: dataset = rand(20,2); zoneXY = rand(1,2); zoneRadius = rand(1); dists = sqrt(sum(bsxfun(...

11年以上前 | 0

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Interpolating vectors at specific points
Hi Christopher, here's a solution that does the job. If you can guarantee that you only have one crossing in your vector V, then...

11年以上前 | 0

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What am I doing wrong with object oriented programming?
Mark, you're almost there. Here's how to "just get it running": methods function q = calculateSin(this, x) ...

11年以上前 | 0

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how to calcuate mean with NaN
If you have the Statistics Toolbox, just replace calls to |mean()| with calls to |nanmean()|. If you don't have it, you can d...

11年以上前 | 0

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2D Contour colormap too dark.
Hi Marc, Got it. The RGB values you're copying in are 8-bit RGB colours of integers ranging from 0 to 255. You're right that ...

11年以上前 | 0

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Elevate a single isoline in a contour (2D) plot
Hi Marc, Is this what you're trying to do? [x,y,z] = peaks; z = z*10 figure [c,h] = contour(x,y,z,'LevelStep',2...

11年以上前 | 1

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update objects' coordinate of the same plot !!!!!!!!!!!!!!!!!!!
Hi Bolivar, Let's just go with one object first for simplicity: Here's the contents of the *user1* class: classdef us...

11年以上前 | 0

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How to convert binary image to 2D triangulation?
Geert, here's how I'd do it. Note that I use <http://www.mathworks.com/matlabcentral/fileexchange/30525-isocontour isocontour> f...

11年以上前 | 2

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How to convert 2D triangulation to binary image?
Hi Geert, Here's something that does what you want. It's not optimised for speed as it simply iterates naively through triang...

11年以上前 | 0

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Plotting 4d data with matrices.
Naty, as per the comment above I can't replicate your exact data, but here's an example that should show you how to make the fig...

11年以上前 | 1

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count of months spanned
Hi Leah, I think you can do this quite nicely as follows: startvecs = datevec(startdates); endvecs = datevec(enddates...

11年以上前 | 1

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Nested if statement won't execute
Perhaps the value of |i| is never set, or at least never set _in the scope of the loop that you are running_. Perhaps you mean |...

11年以上前 | 0

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Errors in solving nonlinear simultaneous equations
You can't plot a simultaneous equation during iterations in that way. If you instead put: options = optimoptions('fsolve...

11年以上前 | 1

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Retrieve all data from columns apart from id when using MySQL
Hi Gurvinder, Can I suggest that I think it would be easier for you to simply get _all_ the fields, and then just discard the...

11年以上前 | 1

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質問

Equation of a constrained circle
I have a circle with known parameters (x,y,r): x = 37 y = -7 r = 38 I would like to find the parameters of a new c...

11年以上前 | 1 件の回答 | 0

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質問

Convert/decompose formula terms similarly to LinearModel
I'm trying to do something which must be implicitly done inside *LinearModel.predict()*, but I can't seem to get to it. The t...

11年以上前 | 1 件の回答 | 0

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Plotting elements of a matrix versus elements of another
Ryan, does this do what you wanted? X = rand(10,10) Y = X^2 figure, stem(X(:),Y(:)) The (:) operator will basicall...

12年弱前 | 1

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Accessing values of fieldnames in a structure without using the fieldnames function
Hi Jess, Use parentheses: S = struct('field1',1,'field2',2) fieldStr = ['fields' num2str(1)] S.(fieldStr) ans =...

12年弱前 | 1

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